Pulley bearing for venetian blind head bars



March 6, 1951 M. BIRD 2,544,005

PULLEY BEARING FOR VENETIAN BLIND HEAD BARS Filed Jan. 22, 1948 L4 15 i w 1-. i 6

INVENTOR. Mcfiad fiz'fci,

Patented Mar. 6, 1951 UNITED STATES PULLEY BEARING FOR VENETIANBIIND HEAD BARS Michael Bird, Chicago, Ill.

Application January 22, 1948, Serial No. 3,708

1 Claim.

The present invention relates to Venetian blinds, and has for its main object the provision of mounting means for pulleys in Venetian blind head bars.

In a Venetian blind head bar a longitudinal recess is provided within which pulleys are journalled for supporting cords, by which tilting mechanism is actuated for operating tilt bar and slats. Ordinarily such pulleys are journalled on pins which are driventhrough the body of thehead bar adjacent the recess within which pulleys are receivable. Oftentimes pins split the Wood when driven through the bar, or the wood is split subsequently thereto during the use of a Venetian blind. To obviate these objections, another object of the present invention is the provision of a suitable bearing insertable within the recess aforesaid for journalling therewithin a pulley, and which bearing may be readily affixed to the head bar with the pulley, as a unit, thereby avoiding driving of pins through the head bar.

With the above general objects in view and others that will appear as the invention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawing and pointed out in the appended claim.

In the drawing forming a part of this application, and in which like designating characters refer to corresponding parts throughout the several views:

Fig. 1 is a transverse cross-sectional view through a Venetian blind head bar with a hearing supporting a pulley in an operative association therewith; and a Fig. 2 is a fragmentary bottom elevational View of the head bar with the bearing and pulley in an operative association therewith.

Referring in detail to the present drawing there is shown therein a Venetian blind head bar III, which is of a substantially rectangular formation on a transverse cross-section. At its bottom face head bar In is provided with a longitudinal central recess within which a pulley at each end is receivable in a transverse relation with the head bar for supporting a cord by means of which tilting mechanism for the tilt bar and slats may be actuated. Ordinarily pulleys were supported by a pin driven through the body of the head bar on both sides of said recess H. The pin driven through the wood of the head bar oftentime split the same, or the wood became split at subsequent time during the function of the pulley. To obviate these objections a suitable bearing for su porting the pulley is provided, and which bearing width and depth, respectively, of said recess ll,-

so that when said U-shaped portion I3 is inserted within said recess II it snugly fits therewithin. In the operative position of the bearing with head bar In said Wings I4 overlie and contact the bottom face of said head bar III and. are there rigidly attached to the adjacent body portions of said head bar Ill by a plurality of screws I5.

Riveted or otherwise suitably rigidly attached to the upright walls of said U-shaped portion I3, and in a transverse relation with the latter, is shaft I6, upon which pulley I1 is journalled.

From the hereinabove description it will be readily seen that hearing l2 and pulley I'I constitute a unit which may readily be inserted within recess II, or removed therefrom. In the operative association of bearing I2 with head bar ID, the former is maintained rigidly with the latter, without necessity of driving pin transversely through the head bar as ordinarily is the practise, thereby obviating splitting of the wood. Furthermore, before the bearing is attached to head bar Ill by means of screws [5, the same may be longitudinally shifted within recess I I so as to bring the bearing within proper alinement with the tilting mechanism before the bearing is permanently attached to the head bar by means of said screws l5.

While there is described herein a preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

What I claim as new is:

In a Venetian blind, an elongated head bar substantially rectangular in transverse crosssection, said head bar having an elongated substantially U-shaped, centrally positioned recess projecting inwardly from one of the faces and extending longitudinally thereof, a substantially U-shaped bearing member comprising a base and a pair of spaced parallel arms each having a free end and extending away from said base in the same direction, an integrally formed wing pro- 2,544,005 3 4 jecting laterally away from each of said free ends REFERENCES CITED and away from each other, said wings being sub- 5 stantially parallel to said base, said U-shaped The fol-lowmg references are of recold in the file of th1s patent.

bearmg belng transversely nested wlthm sald U-shaped recess in faceto-face engagement with 5 UNITED STATES PATENTS each other and said Wings extending transversely Number N Dat of said head bar at opposite sides f said recess, 450,392 Wilson Apr. 14, 1891 means securing said wings to said head ar, a 2, 07,376 Latham July 9, 1935 pin mounted within said U- hap bearing and 2,012,856 Latham Aug. 27, 1935 supported at each end by said rm nd a pulley 10 2,054,240 Burns Sept. 15, 1936 journaled on said pin between said arms- 2,1 0,145 Loeh Mar. 8, 1938 I H L I D, 2,2 9,854 Kuyper Jan. 13, 1942 

